Try Our Apps

[far-uh d, -ad] /ˈfær əd, -æd/
noun, Electricity.
1.
the standard unit of capacitance in the International System of Units (SI), formally defined to be the capacitance of a capacitor between the plates of which there appears a potential difference of one volt when it is charged by a quantity of electricity equal to one coulomb. Symbol: F.
1860-1865
First recorded in 1860-65; named after M. Faraday
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
Cite This Source
Examples from the Web for farad
Historical Examples
• farad, the unit of electrical energy, so called from faraday.

Edited by Rev. James Wood
• The farad being inconveniently large for practical use, one-millionth of a farad, called a microfarad, is generally adopted.

Nehemiah Hawkins
• The capacity of a condenser which would contain a charge of one coulomb under one volt pressure is the farad.

Nehemiah Hawkins
• Since the farad is far too large for practical purposes a millionth of a farad, or microfarad, whose symbol is mfd., is used.

A. Frederick Collins
• As this unit is inconveniently large, for practical applications the unit microfarad—millionth of a farad—is employed.

Kempster Miller
• farad, the practical unit of capacity for electricity, in the electromagnetic system of units.

Various
• The condensers used in the above experiment have a capacity of one microfarad, or one millionth of a farad.

Willis Eugene Tower
• The practical unit of capacity is called the micro-farad, the real unit is the farad, and takes its name from faraday.

Elisha Gray
British Dictionary definitions for farad

/ˈfærəd; -æd/
noun
1.
(physics) the derived SI unit of electric capacitance; the capacitance of a capacitor between the plates of which a potential of 1 volt is created by a charge of 1 coulomb F
Word Origin
C19: named after Michael Faraday
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for farad
n.

unit of electric capacity, suggested 1861, first used 1868, named for English physicist Michael Faraday (1791-1867). Related: Faradic.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source

n.
The unit of capacitance in the meter-kilogram-second system equal to the capacitance of a capacitor having a charge of 1 coulomb when a potential difference of 1 volt is applied.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
 farad   (fār'əd)    The SI derived unit used to measure electric capacitance. A capacitor in which a stored charge of one coulomb provides an electric potential difference of one volt across its plates has a capacitance of one farad.
The American Heritage® Science Dictionary
Cite This Source

### Difficulty index for farad

Many English speakers likely know this word

### Word Value for farad

9
9
Scrabble Words With Friends